[chimerax-users] equivalent to "define"?

Hi there,

Having looked through the docs a few times, I'm pretty sure I know the answer, but here goes...

Is there a ChimeraX equivalent to define https://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/define.html in Chimera 1? Or any other facility to draw geometric shapes (I'm particularly interested in calculating and drawing planes)?

Cheers, Alexis